Gaya APA
Population Resources and The Environment. (1991).
London:
UNFPA.
Gaya Chicago
Population Resources and The Environment.
.
London:
UNFPA,
1991.
Text.
Gaya MLA
Population Resources and The Environment.
.
London:
UNFPA,
1991.
Text.
Gaya Turabian
Population Resources and The Environment.
London:
UNFPA,
1991.
Print.